For more than 1000 years, we have known that the seas off the coast of Sendai in Japan can turn treacherous. An account of how one quake unleashed a flood that swept away a castle town can be found in Nihon Sandai Jitsuroku (The True History of Three Reigns of Japan), completed in AD 901 for the emperor. (Editorial)
Links:
[1] http://admin.indiaenvironmentportal.org.in/feature-article/time-rethink-megaquakes
[2] http://admin.indiaenvironmentportal.org.in/category/journal/new-scientist
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/earthquakes
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/geology
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/natural-disasters
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/disaster-management
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/japan
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/tsunami